Ava Lee is a young Chinese-Canadian forensic accountant who works for an elderly Hong Kong-based "Uncle," who may or may not have ties to the Triads. At 115 lbs., she hardly seems a threat. But her razorsharp intellect and resourcefulness allows her to succeed where traditional methods have failed. In The Water Rat of Wanchai, Ava travels across continents to track $5 million owed by a seafood company. But it's in Guyana where she meets…